<div th:fragment="head" xmlns:th="http://www.thymeleaf.org">
<head>
    <title>动态网关管理中心</title>
    <link rel="stylesheet" th:href="@{/lay/css/layui.css}" type="text/css" />
    <link rel="stylesheet" th:href="@{/css/index.css}" type="text/css" />
</head>
</div>